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How to Fix Avast Service High CPU Usage on Windows 10 and 11

By metsPosted on Posted in Sport Gear

How to Fix Avast Service High CPU Usage on Windows 10 and 11

High CPU usage caused by Avast services can slow down your Windows 10 or 11 computer, leading to decreased performance and potential system instability. This guide provides clear, step-by-step instructions to diagnose and fix Avast-related high CPU issues, helping your system run smoothly again. Before starting, ensure you have administrator access to your computer and a stable internet connection for potential updates or downloads.

What You’ll Need

  • Administrator access to your Windows 10 or 11 PC
  • Basic understanding of Windows Task Manager and Services
  • Optional: Avast antivirus software updated to the latest version

Step-by-Step

  1. Open Task Manager: Press Ctrl + Shift + Esc simultaneously to launch Task Manager. Alternatively, right-click the taskbar and select ‘Task Manager.’
  2. Identify Avast Processes: In the Processes tab, look for processes named ‘Avast Antivirus,’ ‘AvastSvc.exe,’ or similar. Check CPU usage percentages. If Avast processes are consuming high CPU (above 20-30%), proceed to the next step.
  3. End the Avast Process Temporarily: Right-click on the Avast process and select ‘End Task.’ This is a temporary fix to see if CPU usage drops. If it does, continue with further troubleshooting.
  4. Open Services Panel: Press Windows + R, type ‘services.msc’, and press Enter. This opens the Services window.
  5. Locate Avast Services: Scroll through the list to find ‘Avast Antivirus’ or ‘AvastSvc.’ Right-click on it and select ‘Properties.’
  6. Change Startup Type: In the Properties window, set the Startup type to ‘Manual’ or ‘Disabled’ to prevent it from starting automatically. Click ‘Apply’ and then ‘OK.’
  7. Restart Your Computer: Reboot your PC to apply changes. After restart, monitor CPU usage again via Task Manager.
  8. Update Avast: Open Avast, go to ‘Settings’ > ‘Update,’ and ensure both Virus definitions and program are up-to-date. Sometimes, high CPU usage is due to outdated software.
  9. Reinstall Avast if Needed: If high CPU persists, uninstall Avast via ‘Apps & Features,’ then download and install the latest version from the official Avast website.
  10. Perform a System Scan: Use Windows Defender or another trusted tool to run a full system scan to rule out malware conflicts that could be causing Avast to overwork.

Common Mistakes

  • Disabling Avast without understanding the consequences can leave your system vulnerable to threats.
  • Not updating Avast regularly, which can cause bugs and high CPU issues.
  • Uninstalling Avast improperly, leading to residual files that cause conflicts.
  • Ignoring other background processes that might also be responsible for high CPU usage.

Tips

  • Always back up your system before making significant changes to system services or security software.
  • Use the built-in Windows Troubleshooter for performance issues before adjusting antivirus settings.
  • Schedule regular Avast updates and scans to prevent bugs and performance issues.
  • Consider switching to a different antivirus if Avast consistently causes high CPU load and issues cannot be resolved.

Troubleshooting

If the above steps do not resolve the high CPU usage issue caused by Avast, try the following:

  1. Boot into Safe Mode: Restart your computer and boot into Safe Mode. This minimizes background processes. Check if Avast still consumes high CPU in Safe Mode. If not, a conflict with other software may exist.
  2. Perform a Clean Boot: Use ‘msconfig’ to disable non-Microsoft services and startup items. Then, enable Avast to see if the high CPU problem persists. This helps identify conflicting software.
  3. Check for Malware: Run a full system scan with Windows Defender or another reputable malware scanner. Malware can cause Avast to behave abnormally.
  4. Contact Avast Support: If issues persist, reach out to Avast customer support for tailored assistance or consider temporarily disabling Avast until a fix is available.

Frequently Asked Questions

Why does Avast cause high CPU usage?

High CPU usage from Avast can result from outdated software, conflicts with other programs, or malware infections that interfere with its operation.

Is it safe to disable Avast to fix CPU issues?

Temporarily disabling Avast can improve performance, but ensure you re-enable it promptly to keep your system protected from threats.

How often should I update Avast?

Update Avast daily or at least weekly to ensure you have the latest virus definitions and software improvements, reducing bugs and performance issues.

Will uninstalling Avast remove all its files?

Proper uninstallation via ‘Apps & Features’ removes most files, but some residual files may remain. Use dedicated cleanup tools if needed.

Can high CPU usage be caused by other programs?

Yes, other background processes or malware can cause high CPU load; always check Task Manager for other culprits.

Should I switch to a different antivirus?

If Avast repeatedly causes issues and cannot be fixed, consider switching to a different reputable antivirus program that better suits your system needs.

Fixing Avast service high CPU usage involves a combination of troubleshooting, updating, and sometimes reconfiguring or reinstalling the software. Regular maintenance and system checks can prevent future issues, ensuring your Windows 10 or 11 runs smoothly and securely.

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How to Fix Avast Service High CPU Usage on Windows 10 and 11
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